Home / 2,915.28-4,371.36-966.78

Finding the Fourth Proportional to 2,915.28, 4,371.36 and 966.78

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Solution

The fourth proportional to 2,915.28, 4,371.36 and 966.78 is: 1,449.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.28 : 4,371.36 = 966.78 : x
  2. Step 2: Convert to fraction form
    2,915.28/4,371.36 = 966.78/x
  3. Step 3: Cross multiply
    2,915.28x = 4,371.36 × 966.78
  4. Step 4: Simplify right side
    2,915.28x = 4,226,143.42
  5. Step 5: Solve for x
    x = 4,226,143.42/2,915.28
  6. Step 6: Final answer
    x = 1,449.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.